#!/bin/sh
# (c) Dinko Korunic, InfoMAR, 2009

# program presrece SAP e-mail ZIP-ove i sprema u centralni repozitorij
# pri tome uniquely naziva datotekea ukoliko je to moguce, dajuci im imena
# sa tipicnim Unix timestampom


REPO="/home/sap"
WHOAMI=$(getent passwd | gawk -F: \
    '{ if ($3 == PROCINFO["uid"]) { split($5, a, ","); print a[1] }}')
REPOUSER="$REPO/$WHOAMI/$(date +%d-%m-%Y)"
REPOUSERTMP="$REPOUSER/tmp"

# generates unique destination name for ZIPs and moves required file into
# destination
function ziprenmv()
{
    ORIGFILE="$1"
    DESTDIR="$2"

    [ -z "$ORIGFILE" ] && exit 1
    [ -z "$DESTDIR" ] && exit 1

    BASENAME=$(basename "$ORIGFILE" | sed -e 's/.zip$//gi')
    TS=$(date +%s)

    # generate unique name and rename file if possible
    while true; do
        DESTNAME="$DESTDIR/$BASENAME-$TS.ZIP"
        if [ ! -f "$DESTNAME" ]; then
            mv -f "$ORIGFILE" "$DESTNAME"
            break
        else
            # offset by one..
            TS=$(expr $TS + 1)
        fi
    done
}

# security stuff
cd "$HOME"
umask 022

# sanity checks
[ -z "$REPO" ] && exit 1
[ -z "$WHOAMI" ] && WHOAMI=$(whoami)
[ -z "$REPOUSER" ] && exit 1

# make REPO per user and date
mkdir -p "$REPOUSER"

# make TMP directory
if [ -d "$REPOUSERTMP" ]; then
    rm -rf "$REPOUSERTMP"
fi
mkdir -p "$REPOUSERTMP"

# change pwd
cd "$REPOUSERTMP"

# go with unpacking
munpack -f -q -t >/dev/null 2>&1

# remove all part and desc files
find "$REPOUSERTMP" -type f \( -iname 'part*' -o -iname '*desc' \) \
    -exec rm -f '{}' '+'

# uniquely rename all zips and move them to central repo
find "$REPOUSERTMP" -type f -iname '*zip' | while read i; do
    ziprenmv "$i" "$REPOUSER"
done

# cleanup TMP directory (trap maybe?)
cd "$HOME"
rm -rf "$REPOUSERTMP"

exit 0